| 摘要 |
The present invention relates to an antenna arrangement (1) comprising at least two antenna functions (2, 3, 4, 5) arranged to cover a certain angular sector (6). Each antenna function (2, 3, 4, 5) comprises a corresponding antenna port. The antenna arrangement (1) is arranged to perform a first direction of arrival, DOA, estimation for a transmitting device (12) at a first frequency (f1). The antenna arrangement (1) is furthermore arranged to perform a second DOA estimation for the transmitting device (12) at a second frequency (f2), the second frequency (f2) being of larger magnitude than the first frequency (f1). At least one second frequency grating lobe (13, 14; 31, 32, 33, 34, 35, 36) is apparent in the angular sector (6) at the second frequency (f2). The antenna arrangement (1) is arranged to separate said second frequency grating lobe (13, 14; 31, 32, 33, 34, 35, 36) from a second frequency main lobe (15, 15') by means of results from the first DOA estimation, a pointing direction (17, 17') of the second frequency main lobe (15, 15') forming a resulting DOA estimation. The present invention also relates to a corresponding method. |
